/* Reset e configurações base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Cores principais */
    --primary-color: #8B4513;
    --primary-dark: #5D4037;
    --primary-light: #A0522D;
    --secondary-color: #D2691E;
    --accent-color: #FF8C00;
    
    /* Cores neutras */
    --bg-primary: #FAFAFA;
    --bg-secondary: #FFFFFF;
    --bg-card: #F8F9FA;
    --text-primary: #212121;
    --text-secondary: #424242;
    --text-muted: #757575;
    --border-color: #E0E0E0;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --shadow-dark: rgba(0, 0, 0, 0.25);
    
    /* Tipografia */
    --font-primary: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    
    /* Espaçamentos */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Bordas */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transições */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Importação de fontes */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

/* Configurações globais */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-primary) 0%, #F5F5F5 100%);
    min-height: 100vh;
}

/* Container principal */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navegação */
.navbar {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    box-shadow: 0 4px 20px var(--shadow-medium);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.25rem;
    transition: var(--transition-normal);
}

.nav-logo:hover {
    transform: translateY(-2px);
    color: var(--accent-color);
}

.nav-logo-icon {
    width: 32px;
    height: 32px;
    background: var(--accent-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-item a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    position: relative;
}

.nav-item a:hover,
.nav-item a.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
    transform: translateY(-2px);
}

.nav-item a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition-normal);
    transform: translateX(-50%);
}

.nav-item a:hover::after,
.nav-item a.active::after {
    width: 80%;
}

/* Menu mobile */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Header principal com viola */
.main-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 0;
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
    overflow: hidden;
    position: relative;
    box-shadow: 0 8px 32px var(--shadow-dark);
}

.viola-neck {
    height: 120px;
    background: linear-gradient(to bottom, #8B4513, #5D4037, #3E2723);
    position: relative;
    border-bottom: 3px solid #1a1a1a;
}

.viola-header {
    padding: var(--spacing-2xl);
    text-align: center;
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, rgba(139, 69, 19, 0.9), rgba(93, 64, 55, 0.9));
}

.viola-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: 1px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.viola-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.viola-head {
    height: 80px;
    background: #3E2723;
    border-top: 3px solid #1a1a1a;
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-md) var(--spacing-2xl);
    align-items: center;
}

.viola-tuning-peg {
    width: 16px;
    height: 50px;
    background: linear-gradient(to bottom, #212121, #424242);
    border-radius: var(--radius-md);
    position: relative;
    box-shadow: 0 4px 8px rgba(0,0,0,0.4);
    transition: var(--transition-normal);
}

.viola-tuning-peg:hover {
    transform: translateY(-2px);
}

.viola-tuning-peg::after {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 16px;
    background: linear-gradient(to bottom, #212121, #424242);
    border-radius: 12px 12px 0 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.viola-frets {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
}

.viola-fret {
    height: 100%;
    width: 6px;
    background: linear-gradient(to bottom, #212121, #424242);
    position: relative;
    box-shadow: 2px 0 4px rgba(0,0,0,0.5);
}

.viola-strings {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: var(--spacing-md) 0;
}

.viola-string {
    height: 2px;
    background: linear-gradient(to right, #E0E0E0, #BDBDBD, #E0E0E0);
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
    border-radius: 1px;
}

/* Layout principal */
.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-light);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px var(--shadow-medium);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-lg) var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: var(--transition-slow);
}

.card:hover .card-header::before {
    transform: translateX(100%);
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

/* Força cor branca nos títulos dos cards, mesmo com emoji */
.card-header h2, .card-header, .card-header * {
    color: #fff !important;
    text-shadow: 0 1px 4px #0002;
}

.card-content {
    padding: var(--spacing-xl);
}

/* Formulários */
.form-group {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

input[type="file"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-normal);
    resize: vertical;
}

input[type="file"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.1);
    background: var(--bg-secondary);
}

textarea {
    font-family: var(--font-mono);
    line-height: 1.5;
    min-height: 120px;
}

/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(139, 69, 19, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 69, 19, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), #B8860B);
    color: white;
    box-shadow: 0 4px 12px rgba(210, 105, 30, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(210, 105, 30, 0.4);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-normal);
}

.btn:hover::before {
    left: 100%;
}

/* Preview de tablatura */
.tablatura-preview {
    font-family: var(--font-mono);
    white-space: pre;
    overflow-x: auto;
    background: linear-gradient(135deg, #F8F9FA, #F0F0F0);
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    max-height: 400px;
    overflow-y: auto;
    font-size: 0.9rem;
    line-height: 1.4;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Informações de afinação */
.afinacao-info {
    background: linear-gradient(135deg, var(--bg-card), #F0F0F0);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
    border-left: 4px solid var(--primary-color);
    box-shadow: 0 2px 8px var(--shadow-light);
}

.afinacao-info h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

/* Loading */
.loading {
    display: none;
    text-align: center;
    margin: var(--spacing-xl) 0;
}

.spinner {
    border: 4px solid rgba(139, 69, 19, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border-left-color: var(--primary-color);
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Seções de conteúdo */
.content-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    margin: var(--spacing-xl) 0;
    box-shadow: 0 4px 20px var(--shadow-light);
    border: 1px solid var(--border-color);
}

.content-section h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.content-section h3 {
    color: var(--primary-dark);
    font-size: 1.5rem;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
}

.content-section h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.content-section p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    color: var(--text-secondary);
}

.content-section ul {
    margin: var(--spacing-md) 0 var(--spacing-lg) var(--spacing-xl);
}

.content-section li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.destaque {
    background: linear-gradient(135deg, #FFF8E1, #FFFDE7);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
    border-left: 4px solid var(--accent-color);
    box-shadow: 0 2px 12px rgba(255, 140, 0, 0.1);
}

.destaque h4 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
}

/* Footer */
.main-footer {
    background: linear-gradient(135deg, var(--primary-dark), #2C1810);
    color: white;
    text-align: center;
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.main-footer p {
    margin: 0;
    opacity: 0.9;
}

/* Seção de doação */
.donation-section {
    background: linear-gradient(135deg, #FFF3E0, #FFE0B2);
    border: 2px solid var(--accent-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    margin: var(--spacing-xl) auto;
    max-width: 500px;
    box-shadow: 0 8px 32px rgba(255, 140, 0, 0.2);
}

.donation-section h2 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-lg);
}

.donation-btn {
    background: linear-gradient(135deg, var(--accent-color), #FF7043);
    color: white;
    font-size: 1.1rem;
    padding: var(--spacing-md) var(--spacing-2xl);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-bottom: var(--spacing-lg);
    transition: var(--transition-normal);
    box-shadow: 0 4px 16px rgba(255, 140, 0, 0.3);
}

.donation-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 140, 0, 0.4);
}

.qr-code {
    width: 180px;
    height: 180px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    background: white;
    padding: var(--spacing-sm);
    margin: 0 auto;
    box-shadow: 0 4px 12px var(--shadow-light);
}

/* Responsividade */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-color);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: 0 4px 20px var(--shadow-medium);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .viola-header h1 {
        font-size: 2rem;
    }
    
    .viola-header p {
        font-size: 1rem;
    }
    
    .card-content {
        padding: var(--spacing-lg);
    }
    
    .content-section {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: 0 var(--spacing-sm);
    }
    
    .viola-header {
        padding: var(--spacing-lg);
    }
    
    .viola-header h1 {
        font-size: 1.8rem;
    }
    
    .card-content {
        padding: var(--spacing-md);
    }
    
    .content-section {
        padding: var(--spacing-md);
    }
}

/* Animações */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Utilitários */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }